Product Description

The Adjustable Cavity Closer 50–100mm is a versatile and effective solution for sealing cavities around window and door openings in masonry, timber frame, and steel frame wall constructions. Designed for both new build and refurbishment projects, this innovative closer helps eliminate cold bridging and improves thermal efficiency.
With its multi-width design and easy-to-follow cut markings, installation is quick and hassle-free—ideal for situations where cavity sizes vary or are unknown. Manufactured from a combination of EPS foam and rigid plastic, this cavity closer also helps reduce the risk of condensation, mould, and moisture migration, ensuring compliance with modern building regulations.
Its fully rigid PVC construction provides structural integrity and ensures a secure fit, making it a reliable choice for builders, installers, and specifiers alike.

Key Features:

• Adjustable to fit 50–100mm cavities
• Quick and easy to install – cut-to-size indicators
• Reduces cold bridging and heat loss
• Minimises condensation and moisture migration
• Suitable for masonry, timber, and steel frame systems
• Fire Rated to BS EN 13501-1:2007 + A1:2009 (Rating: E)
• Thermal conductivity: 0.030 W/mK
• Complies with BS EN 13163:2012 + A2:2016
• Ideal for both new builds and refurbishments
• Dimensions: 2400mm (L) x 100mm (W) x 18mm (D)
• Material: EPS foam with rigid PVC flange